Combination ball valve and check valve



FIG. 1 is a perspective view of the combination ball valve and check valve showing my new design.

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a left end elevational view thereof;

FIG. 5 is a right end elevational view thereof;

FIG. 6 is a rear elevational view thereof; and,

FIG. 7 is a front elevational view thereof. 

The ornamental design for a combination ball valve and check valve, as shown and described. 